data: storing type modifiers in edges

- ASTVisitor uses DataType instead of string to pass on type information.
- Edges can have EdgeComponents.
- EdgeComponentDataType stores information that modifies the type a ...TYPE_OF edge points to.
- EdgeComponentDataType can create a complete DataType using it's internal information.
- Fixed a bug where DataTypeModifiers did not apply their qualifiers.

src/lib/utility/utilityClang.cpp

@@ -1,5 +0,0 @@
-#include "utility/utilityClang.h"
-
-namespace utility
-{
-}

src/lib/utility/utilityClang.h

@@ -1,14 +0,0 @@
-#ifndef UTILITY_CLANG_H
-#define UTILITY_CLANG_H
-
-#include <memory>
-
-#include "clang/AST/Type.h"
-
-class DataType;
-
-namespace utility
-{
-}
-
-#endif // UTILITY_CLANG_H